MEQ mid-range EQ pultec style (was meq500)

[ioaudio]

i have not given my permission to anyone to copy the design of the opamp pcb. ban?
i´m actually kidding, copy ahead, but i would prefer if you ask me before.
the opamp was a super quick design to fill the unused space from the transformer cutout. today i would make the circuit different.

-max

 

[clintrubber]

Hi Max,

I know it was in jest  but as I understood there was no copying involved, just two PCBs from the boardset that were not used by seller so he put them on the Black Market.

Bye,

  Peter

 

[Tungstengruvsten]

just to chime in - that's exactly what it was!    No worries.

 

[ioaudio]

ah - ok  - no ban required 

 

[Knarleybass]

Can I run the MEQ500 with the M.NATS JE-990 opamp +/- 18 Volts? And for that matter can I run the MEQ500 at +/- 18 Volts with the stock opamp?

 

[canidoit]

How do these sound and compare to the JLM PEQ-500 or Avedis EM-PEQ 500 series Pultecs? Anyone reviewed this unit properly?

Do you have a full kit requiring no purchase of anything else after? How much to ship to Australia?

 

[emrr]

This is the mid eq, those are the program eq.  Haven't seen reports of that many actually operational, a full year later.  I haven't done mine yet.  :

 

[Knarleybass]

I have one up and running, at least 95% there, I need a new pot for the high frequency boost. As far as sound goes, it sounds great, though I don't have a real Pultec to test it against. I am still curious about the voltage/opamp thing.

 

[canidoit]

This is the mid eq, those are the program eq.   Haven't seen reports of that many actually operational, a full year later.   I haven't done mine yet.   :

What do you mean by mid EQ and program EQ?

 

[Knarleybass]

if I am not mistaken it's a clone of the Pultec MEQ-5 but with a solid state makeup gain stage and it can fit in a Lunch Box.

 

[Rob Flinn]

if I am not mistaken it's a clone of the Pultec MEQ-5 but with a solid state makeup gain stage and it can fit in a Lunch Box.

That is correct, I have finished my pair & they sound really nice.  I'm not really understanding why people are taking so long assembling these.  They have to be one of the simplest things I've put together recently.

 

[okgb]

Measuring [ i can't cut or drill straight or even ] the faceplate
and bracket is my hold up
anyone have artwork for it around ?

 

[buschfsu]

What do you mean by mid EQ and program EQ?

midrange equalizer vs high and low boost/cut equalizers.

 

[Rob Flinn]

Measuring [ i can't cut or drill straight or even ] the faceplate
and bracket is my hold up
anyone have artwork for it around ?

Did you try looking at the 1st page of this thread for the artwork ??????? 

I had some very nice panels fabricated by a member here.  I have just emailed him so you never know you might find they become available !!

 

[okgb]

yeah i did
the engraver here wants a cad file
dfx or other

 

[Knarleybass]

so, any thoughts on the MEQ500 with the M.NATS JE-990 opamp +/- 18 Volts?, do I need to do any modifications to make that work?

Also, can I use a regular 2.2k non reverse pot for the mid cut? will it just work backwards?

Has anyone figured out the bandwidth switches?

 

[buschfsu]

drew this while looking at the pcb.  any changes for the JHARDY 990c? seems like it should work ok with that amp....

 

[buschfsu]

one question, what does the 47r across the dc blocking cap on the output do for the amp?  inc output impedance?

 

[benlindell]

So the bypass switch, just wondering how everyone else did it? I read somewhere about using a 3pst switch for each wiper, how would that be connected up? Is it feasible to switch the in +/- to the out +/-, true bypass?

Thanks guys,

 

[Rob Flinn]

I didn't bother with a bypass.  If you happen to use half normalised patchbays is easy just to pull 1 plug & get true bypass for the cost effective price of -1 switch !